Install ESA SNAP ToolBox along with Current Updates and Snappy Python on UBUNTU 18.04 for Satellite Imagery Analysis
Install GDAL libraries which is the most important prerequisite for building ESA SNAP toolbox.
sudo apt install — reinstall gdal-bin libgdal-dev python-gdal python3-gdal
For Installing Snap Toolbox for Ubuntu ,we need to go to the following link and :
Click the Ubutu Software link to download the Snap Toobox Installer for Ubuntu
Or
We can directly download in command line using
wget https://download.esa.int/step/snap/8.0/installers/esa-snap_sentinel_unix_8_0.sh
Give the permission to execute the installer:
sudo chmod 777 esa-snap_sentinel_unix_8_0.sh
Install the Software:
$ ./esa-snap_sentinel_unix_8_0.sh
Unpacking JRE …
Starting Installer …
This will install ESA SNAP on your computer.
OK [o, Enter], Cancel [c]
Click Next to continue, or Cancel to exit Setup.
Delete SNAP’s configuration data and user settings?
The installer detected SNAP user data directories from a previous
installation. These directories contain system file used by the application
and also stored graphs, RGB profiles or other auxiliary data. The data
stored in these directories might not be compatible with this new SNAP
version anymore.
Shall the installer try to remove these directories?
Yes, try deleting all SNAP user data [1], Delete only SNAP-internal configuration data (recommended). [2, Enter]
Select the folder where you would like ESA SNAP to be installed, then click
Next.
Where should ESA SNAP be installed?
[/home/system/snap]
Which components should be installed?
X: SNAP [*1]
2: Sentinel-1 Toolbox [*2]
3: Sentinel-2 Toolbox [*3]
4: Sentinel-3 Toolbox [*4]
5: Radarsat Toolbox [*5]
(To show the description of a component, please enter one of *1, *2, *3, *4, *5)
Please enter a comma-separated list of the selected values or [Enter] for the default selection:
[2,3,4,5]
Create symlinks?
Yes [y, Enter], No [n]
Select the folder where you would like ESA SNAP to create symlinks, then click Next.
[/usr/local/bin]
Which is your preferred Python version?
If you are a Python developer, you can use the SNAP Java API from Python or
you can even develop SNAP processor plugins using Python. Here you can
specify your preferred Python version by the given Python executable to be
used. Only Python versions 2.7, 3.3 and 3.4 are supported.
Configure SNAP for use with Python?
Yes [y], No [n, Enter]
You may type which python in a terminal window to find the path to your
preferred Python version.
After successful configuration you will find the SNAP Python module snappy
in the directory /home/system/.snap/snap-python. The Python interpreter and
the location of the snappy module can be changed any time using the
bin/snappy-conf tool.
Extracting files …
Setup has finished installing ESA SNAP on your computer.
Run SNAP Desktop?
Yes [y, Enter], No [n]
n
From the above console output it is evident that the Snap has been installed in the home folder which is /home/system:
/home/system/snap
Once the Snap Toolbox is installed build the Snap python module:
cd /home/system/snap
cd bin
./snappy-conf /usr/bin/python3.6
/home/system/snap/bin/../platform/lib/nbexec: WARNING: environment variable DISPLAY is not set
Configuring SNAP-Python interface…
Done. The SNAP-Python interface is located in ‘/home/system/.snap/snap-python/snappy’
When using SNAP from Python, either do: sys.path.append(‘/home/system/.snap/snap-python’)
or copy the ‘snappy’ module into your Python’s ‘site-packages’ directory.
[Note: /usr/bin/python3.6 is the python executable path.That means the snappy python package is get installed in the python environment of the executable /usr/bin/python3.6]
Update Snap Toolbox for the latest updates in order to have all the functionalities execute smoothly:
Go to home folder of SNAP located in the $HOME folder as metioned during SNAP installation.
cd /home/system/snap
cd bin
./snap — nogui — modules — update-all
This will apply all the modules and once the updates are done it will show messages as mentioned below:
Updates not found.
updates=0
***BUG!!!! Press CTL+C and end the process .This a bug that after updating the system hangs.
As a workaround for this BUG we can also follow the steps given in https://senbox.atlassian.net/wiki/spaces/SNAP/pages/30539785/Update+SNAP+from+the+command+line#UpdateSNAPfromthecommandline-Updatespecificmodules
snap --nosplash --nogui --modules --update-all 2>&1 | while read -r line; do
echo "$line"
[ "$line" = "updates=0" ] && sleep 2 && pkill -TERM -f "snap/jre/bin/java"
done
Test whether the Updates are applied properly:
./snap — nosplash — nogui — modules — list — refresh
./../platform/lib/nbexec: WARNING: environment variable DISPLAY is not set
Refreshing SNAP Supported Plugins
Refreshing SNAP Core
Refreshing SNAP Toolboxes
Code Name Version State
— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — -
org.csa.rstb.rstb.op.polarimetric.tools 8.0.5 Enabled
org.esa.s2tbx.s2tbx.s2msi.reader 8.0.5 Enabled
org.esa.snap.snap.temporal.percentile 8.0.9 Enabled
org.netbeans.swing.plaf 1.41.1 Enabled
org.netbeans.modules.extexecution 1.48.1 Enabled
org.esa.snap.snap.unmix.ui 8.0.9 Enabled
org.netbeans.modules.options.api 1.45.1 Enabled
org.esa.snap.snap.pgx.reader 8.0.9 Enabled
org.esa.snap.snap.remote.products.repository 8.0.9 Enabled
org.openide.modules 7.48.1 Enabled
org.esa.s2tbx.s2tbx.forest.cover.change 8.0.5 Enabled
org.esa.snap.snap.smart.configurator.ui 8.0.9 Enabled
org.esa.s3tbx.s3tbx.landsat.reader 8.0.4 Enabled
org.esa.sen2coral.sen2coral.kit 1.0.0 Available
org.openide.util.lookup 8.33.1 Enabled
org.netbeans.modules.masterfs.nio2 1.15.1 Enabled
org.esa.s2tbx.s2tbx.alosAV2.reader 8.0.5 Enabled
Test Whether snappy python is working:
/usr/bin/python3.6
import sys
sys.path.append(‘/home/system/.snap/snap-python’)
from snappy import ProductIO